Ok, Anakin getting a padawan was bullshit, which is why I hate Clone Wars. But that's another story homeboy. And Obi-Wan was trained by Yoda before he became Qui-Gon's padawan. And yes only a master should be able to take on a padawan but even that isn't a definite law in the OT, which is how Obi-Wan getting Anakin wasn't a problem. And seriously, we aren't talking about the PT here, we're talking about TFU. I feel you're just REALLY biased against anything besides OT. And I encourage everyone to go watch the Force Unleashed cinematics on YouTube:

Seriously, the story is great, the romantic dialog is much better than anything from the films and it's a great tie to the PT and the OT. I also love how Dark it is.